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[FEN 8/8/4p3/4B1r1/1p6/1KN4b/8/k1N2Rr1 w - - 0 1]

White to mate in two

Solution

[Index of Chessprints]

Solution
 

Today's position comes from: What is a Chess Problem? Peter's Problem World with FIDE Master of Chess Composition Peter Wong White begins with 1.Kc2!, after which the threat is 2.Nb3 mate.  Black can parry this threat with various defences, but these moves enable White to mate in other ways.  For example, 1…bxc3 2.Bxc3 – the two moves here, Black’s defence and White’s correct response, constitute a variation.

Otto Wurzburg American Chess Bulletin 1942

The main variations of this problem are 1…Bf5+ 2.Ne4, 1…R1g2+ 2.N1e2, and 1...R5g2+ 2.N3e2.  These lines represent the thematic play because they share a number of elements: Black checks, but un-guards a white piece (rook or bishop) that is trained on the black king, allowing White to answer the check by interposing a knight, and discover mate at the same time.
 

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